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High-precision GNSS system with multiple or double GNSS receiving systems

A positioning system and receiving system technology, applied in the field of satellite navigation and positioning systems, can solve problems such as difficult to meet positioning requirements

Inactive Publication Date: 2013-12-18
长沙威佳电子科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the SA policy was discontinued on May 1, 2005, the accuracy of single-point positioning is only 20-40m, which is difficult to meet the positioning needs of civilian fields such as aircraft navigation and engineering surveying

Method used

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  • High-precision GNSS system with multiple or double GNSS receiving systems
  • High-precision GNSS system with multiple or double GNSS receiving systems
  • High-precision GNSS system with multiple or double GNSS receiving systems

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Embodiment Construction

[0091] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0092] see figure 1 , a high-precision GNSS positioning system using multiple or dual GNSS receiving systems, characterized in that the GNSS positioning system uses two or more GNSS receiving subsystems, and the GNSS receiving subsystems are all provided with a GPS receiving module. After repeated research, experiments and improvements by those skilled in the art, aiming at the particularity of multiple or dual GNSS receiving systems, in order to improve the receiving accuracy and reduce drift, the positioning data output by the GNSS receiving subsystem is firstly processed by a software differential filter, and then Through the analysis and processing of the GNSS positioning error time series analyzer, the AR model of the positioning error is e...

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Abstract

Disclosed is a high-precision GNSS system with multiple or double GNSS receiving systems. Positioning data are subjected to filter differential and time sequence analysis through the multiple or double GNSS systems; a position and speed model is quickly built from a series of incomplete measurements including noise by an efficient Kalman regressive filter (autoregressive filter) and used to estimate the status of a dynamic system, thus accurate GNSS data is obtained. When the double GNSS systems are not used, the single GNSS system is about 20m in 24-hour repeated positioning precision; at the same spot, after the double GNSS systems are used, the 24-hour repeated positioning precision is about 3m, and the effect is very significant.

Description

technical field [0001] The invention relates to the field of satellite navigation and positioning systems, in particular to a high-precision GNSS positioning system using multiple or double GNSS receiving systems. Background technique [0002] GNSS is the abbreviation of Global Navigation Satellite System. Namely: Global Navigation Satellite System. At present, GNSS includes GPS of the United States, GLONASS of Russia, Galileo system of the European Union, and Compass (Beidou) of China. different. [0003] In satellite positioning, in order to improve the initial positioning speed and obtain higher accuracy, more and stronger satellite signals are often needed to achieve accurate positioning. [0004] In the city, due to the blockage and reflection of high-rise buildings, the satellite signal reception is unstable, and the number of available satellites is small, resulting in positioning drift, low positioning repeatability, large deviation, and greatly affected positioni...

Claims

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Application Information

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IPC IPC(8): G01S19/35
Inventor 易智桢唐卫彬黎建
Owner 长沙威佳电子科技有限公司
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